My Thoughts: I now have yet another genre to think about when we get to the Content-Area unit: Number Books. This is one number book that fourth graders will find to be quite interesting. Full Count follows the same format as its alphabet companion book–a rhyming poem accompanies a more detailed expository explanation of the content behind the rhyme. This book has an added bonus of having illustrations that can support a unit on multiplication. The illustration for 25, shows five groups of five baseball bats. The illustration for 50, shows 10 groups of five jerseys. If you use the TERC math curriculum you may want to use this book for the Ten-Minute Math activity, Quick Images.